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I made yesterday a "glue" mod for my hopup arm, didnt read it from anywhere, so lets see if its not too dark when i get home so i can test it.

Basically i putted some semi-strong glue on the hopup arm, did some forming to it once in a while, and let it harden, if that doesnt work, im thinking of scrapping the glue off and gluing something like a part of a match.
 

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I kind of drifted from this thread, but long story short, here is what I did over a few weeks span:

1. PCS Mod:

Copied and pasted from a while back in my VSR project thread:http://www.c3airsoft.com/showthread.php/vsr-10-project-thread-25460p2.html

Round One:

To start off the morning, I installed the PCS and put the rifle together, noticing a significantly large bulge inside of the rifle. It was slightly crooked but I decided to give it a whirl anyways. Keep in mind, the shim on the arm is still installed, so expect HUGEEE hop or jam right away.

Now with that said, keep in mind, I don't exactly have the luck of the irish, and my four leaf clover is still in my jeans from yesterday, so I was on my own for this one. Went outside, took a shot, and guess what...? Jam..

Round Two:

Decided to do a bit more filing, nothing too significant. Then I removed the shim on the hop up arm. With the PCS, getting hop is not a problem. So no need for extra hop up due to a shim on the arm. With that removed, much easier to install pieces on top/inside gap on arm.

Went out for a test shot, using .3s, and about 15-20% hop up on. The bb flew up a good 60 feet in the air. Very very large amount of hop on that one. I didn't even bother adjusting the hop up for .3s, as it was time to get the big boys out.

Got out the ol' madbull .4s, and gave her a go. Took some shots, with about 10% hop up on, and they're flying. A tad bit curve to the left but not near as bad of a curve as before, where you could literally hit a guy hiding behind a tree...

Overall: Ended up getting too much hop to handle .4s, and despite straight shots, they curved up way too much from all the hop.

In conclusion, the PCS mod=fail

Test Number 2:

So I decided to try using an o-ring instead of a nub. I took a small o-ring and placed it on the shaved down arm. Took some shots, not enough hop.

Then decided to use Mike's arm. I shaved it down just a tad, enough so that the ring could sit on top and not fall off (before the fangs were sanded down, they were like tips, no where for the ring to sit). Took some shots, and was carrying .4s on 5% hop up setting. I managed to get it shooting pretty nicely, enough to play a few games.

Something I am looking into doing is shaving the arms a bit more down, so that I can use .3s as well. By sanding the arm, that will give less hop. That means I can then use lighter bbs, and still use the heavy weights by simply adjusting the hop up for a higher setting.

This worked out perfectly, and I am still using this method to this day.
 

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When you mean "inner tube" of a pen, do you mean the part the holds the ink? I currently ordered a tm precision chamber and barrel set and will be getting it for Christmas. My well mb07 chamber is rather crap, so I am going to do some comparisons also. I think it may have been the bucking as it looked thin and deformed. When Christmas rolls around, I will do some comparisons, maybe the mb07 will have a longer arm too.
 

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I'm going to "steal" this thread a bit, sorry wuzzy.
I got the nineball air seal bucking and was little dissapoint about the amount of hop it gave, so I took a ink tube from a pen, cutted a piece of around quarter of an inch, cutted a piece, so from front/back it looked something like this:
__
/ \
Then i glued it on hopup arm like this:
__
_________/II\
the I's are the original "fangs"
Now I putted it all together, hopup at zero, shot, jam.
After that I "sandpapered" the tube so it's on the same level as the fangs, after that I shimmed the hopup arm and putted it all together.
Then i went outside took some shots at 19yards, hopup at halfway, with 0.25g "close enough" bbs (all i got) and I was impressed about the precision, it was dark already, so I'm going to do some more tests tomorrow.
P.S I realize that this is a necropost, but vsr section isn't very active.
 
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